| VOLUME 20 No. 1 JANUARY 1984 CONSTRUCTIONAL PROJECTS STARDESK by Peter Newbury 16 Provides listening mood enhancement through controlled lighting ULTRASONIC CAMERA TRIGGER by R. A. Penfold 26 Ideal for capturing wildlife on film EXPANDING THE VIC 20 Part Four by Sam Withey 36 High voltage output board and isolated input board SIMPLE SPEECH Part Two by P. Creighton 55 Experimental speech system GENERAL FEATURES COMPACT DISC by Chris Kelly 30 The technology explained VERNON TRENT AT LARGE 34 INTRODUCTION TO DIGITAL ELECTRONICS by M. Tooley BA and D. Whitfield MA MSc CEng MIEE 46 Part 4 of our electronics course SEMICONDUCTOR CIRCUITS by Tom Gaskell BA(Hons) 60 Stereo signal processor (IDA 3810) NEWS AND COMMENT EDITORIAL 13 NEWS AND MARKET PLACE 14 Including Countdown INDUSTRY NOTEBOOK by Nexus 24 News and views on the electronics industry SPECIAL OFFER-CASSETTES 33 SPACEWATCH by Frank W. Hyde 45 Extra-terrestrial activities chronicled BAZAAR 59 Free readers advertisements READOUT 62 SPECIAL SUPPLEMENT MICRO-FILE by A. W. Coles .. .. between pages 34 and 35 Filesheet 1 3 Z8 OUR FEBRUARY ISSUE WILL BE ON SALE FRIDAY, JANUARY 6th, 1984 (for details of contents see page 13/6 Micro-file) VOLUME 20 No. 2 FEBRUARY 1984
CONSTRUCTIONAL PROJECTS
COMPUTER TERMINAL Part 1 by Ray Pinchin 16
Remote VDU/keyboard terminal
CLOCK TIMER by T. J. Johnson 24
Four digit clock with output relay for switching 1OA at 240V
STARDESK Pan Two by Peter Newbury 32
Construction details
TEMPERATURE CONTROLLER by T.J. Johnson 50
Provides a temperature controlled output for switching mains appliances
GENERAL FEATURES
SEMICONDUCTOR CIRCUITS by Tom Gaskell BA (Hons) 28
LED bargraph drivers (UB..B Series)
MONITORS FOR HOME COMPUTERS by M. Tooley BA and D. WhitfieId MA MSc CEng MIEE 44
Specifications explained - buyers guide
VERNON TRENT AT LARGE 56
INTRODUCTION TO DIGITAL ELECTRONICS by M. Tooley BA and D. Whitfield MA MSc CEng MIEE 60
Part 5 of our electronics course MICRO-BUS 67
A monthly focus on micro's for the home constructor NEWS AND COMMENT
EDITORIAL .. .. .. .. .. .. .. .. 13
NEWS AND MARKET PLACE .. .. .. .. 14
Including Countdown and Silicon News Corner
BAZAAR .. .. .. .. 21, 40, 68
Free readers' advertisements
INDUSTRY NOTEBOOK by Nexus 22
News and views on the electronics industry
SPECIAL OFFER-CASSETTES .. .. .. .. .. .. .. 30
PATENTS REVIEW .. .. .. .. .. 43
Improved stereo TV
SPACEWATCH by Frank W. Hyde .. .. .. .. .. 59
SERC scientists 'weigh' a black hole
DUE TO LACK OF SPACE PART FIVE OF EXPANDING THE VIC 20 AND MICRO-FILE HAVE BEEN HELD OVER TILL NEXT MONTH
OUR MARCH ISSUE WILL BE ON SALE FRIDAY, FEBRUARY 3rd, 1984 (for details of contents see page 31) VOLUME 20 No. 6 JUNE 1984 CONSTRUCTIONAL PROJECTS HYPERCHASER By P.Newbury 24 Disco lights sequencer CROSS HATCH GENERATOR by R.A. Penfold 48 Aid to TV servicing CONTINUITY CHECKER by Chris Lare 52 Test unit for low values of resistance SPOT FREQUENCY OSCILLATOR by Tom GaskelI BA(Hons) AMIEE 60 'Quick check' instrument for simple audio systems GENERAL FEATURES TEST INSTRUMENTS-BUYER'S GUIDE 14 Our guide to test instruments INGENUITY UNLIMITED 34 Audible reversing alarm-Scalectrix motor control SPOT-PRICING by T. W. Berrie 35 Interactive consumer/supplier energy tariff system INTRODUCTION TO DIGITAL ELECTRONICS by M. Tooley BA and D. Whitfield MA MSc CEng MIEE 38 A look at CMOS technology VERNON TRENT AT LARGE 47 MICRO-BUS 56 Our monthly focus on micro's for the home constructor SEMICONDUCTOR CIRCUITS by Tom GaskelI BA(Hons) AMIEE 58 Touch Tuners (SAS58O and SAS59O) NEWS AND COMMENT EDITORIAL 11 NEWS AND MARKET PLACE 12 Including Countdown and Points Arising INDUSTRY NOTEBOOK byNexus 23 News and views on the electronics industry SPACEWATCH by Frank W. Hyde 33
An Obituary BAZAAR 44, 51 Free readers' advertisements SPECIAL SUPPLEMENT MICRO-FILE by R. W. Coles .. .. .. .. .. between pages 34 and 35 Filesheet 16 NS 16032 OUR JULY ISSUE WILL BE ON SALE FRIDAY, JUNE 1st, 1984 (for details of contents see page 16/6 of Micro-file)
VOLUME 20 No. 10 OCTOBER 1984
CONSTRUCTIONAL PROJECTS
FILTER SHIFT PHASER by John M. H. Becker .. .. .. .. .. .. 10
Add a new phase to your music
RADAR SECURITY ALARM by Powertran Cybernetics .. .. .. .. .. .. 30
Four-channel doppler radar security alarm
NEPTUNE ROBOTS by Richard Becker and Tim Orr .. .. .. .. .. .. 38
Part Two: Central electronics and computer interfacing
PULSE DIRECTION LOGIC PROBE by S. A. Withey .. .. .. .. .. 52
Detects input/output logic levels plus high-speed pulse direction
OPTO-LOCK by Tom Gaskell BA (Hons) CEng MIEE 56
Security lock using infra-red
GENERAL FEATURES
SEQUENTIAL LOGIC TECHNIQUES 16
Part One: Introduction and counters
DISC DRIVES EXPLAINED by M. Tooley BA and D. Whitfield MA MSc CEng MIEE .. .. 20
Part Two: What to look for and a Buyers Guide
MICRO-BUS .. .. .. .. .. .. .. .. .. .. 29
Focus on micros for the home constructor
VERNON TRENT AT LARGE .. .. .. .. .. .. 51
SEMICONDUCTOR CIRCUITS by Tom Gaskell BA(Hons) CEng MIEE 54
Encoder/decoder (MM53200N)
INGENUITY UNLIMITED .. .. .. .. .. .. .. .. .. 58
Readers circuit ideas NEWS AND COMMENT
EDITORIAL .. .. .. .. .. .. .. .. .. .. .. 7
NEWS AND MARKET PLACE .. .. .. .. .. .. .. .. 8
Including Countdown and Points Arising
INDUSTRY NOTEBOOK by Nexus .. .. .. .. .. .. .. .. 36
News and views on the electronics industry
READOUT .. .. .. .. .. .. .. .. .. .. .. 46
Readers express their opinions
SPACEWATCH by Dr. Patrick Moore 0.B.E. .. .. .. .. .. .. .. 49
Other Solar Systems?; Invisible Bodies; Search for ET; Sky This Month
BAZAAR .. .. .. .. .. .. .. .. .. .. 50
Free readers advertisements
OUR NOVEMBER ISSUE WILL BE ON SALE FRIDAY, OCTOBER 5th. 1984 (for details of contents see page 37)
VOLUME 20 No. 11 NOVEMBER 1984
CONSTRUCTIONAL PROJECTS
RING MODULATOR by John M. H. Becker .. . .. .. .. .. 10
A Sound lab in a box
COMBINATION LOCK by Tom Gaskell BA (Hons) CEng MIEE .. .. .. .. .. 26
High-Low audio combination lock
NEPTUNE ROBOTS by Richard Becker and Tim Orr .. .. .. .. .. .. 28
Part Three: Servo-control circuitry, power supply and pump unit
COMPUTER DFM ADAPTOR by R.A. Penfold .. .. .. .. .. .. 47
Smart test instrument using your micro
GENERAL FEATURES
NICKEL CADMIUM BATTERIES by M. Tooley BA and D. Whitfield MA MSc CEng MIEE .. 17
Part One: Characteristics and construction
SEMICONDUCTOR CIRCUITS by Tom Gaskell BA(Hons) CEng MIEE .. .. .. 24
Pushbutton Locks (LS7228 and LS7229)
DISC DRIVES EXPLAINED by M. Tooley BA and D. WhitfieldMA MSc CEng MIEE .. 40
Part Three: Two dual drive units reviewed
SEQUENTIAL LOGIC TECHNIQUES by M. Tooley BA and D. Whitfield MA MSc CEng MIEE 53
Part Two: Counter chips and circuits
NEWS AND COMMENT
EDITORIAL .. .. .. .. .. .. .. .. .. .. .. 7
NEWS AND MARKET PLACE .. .. .. .. .. .. .. .. 8
Including Countdown and Points Arising
INDUSTRY NOTEBOOK by Nexus 23
News and views on the electronics industry
PRINTED CIRCUIT BOARD SERVICE 37
A new service for readers
SPACEWATCH by Dr. Patrick Moore O.B.E.. .. .. .. .. .. .. .. .. 38
Astronomers are Human; Amateurs Lead the Way; The Sky This Month
BAZAAR .. .. .. .. .. .. .. .. .. 45
Free readers advertisements
SPECIAL SUPPLEMENT
ROBOTICS by Tom Ivall .. .. .. .. .. between pages 32 and 33
Unfortunately we are unable to publish the Radar Security Alarm Part 2 in this issue.
OUR DECEMBER ISSUE WILL BE ON SALE FRIDAY, NOVEMBER 2nd, 1984 (for details of contents see page 36)
VOLUME 20 No. 12 DECEMBER 1984 CONSTRUCTIONAL PROJECTS CAR COMPUTER-Part 1 by S.H. Cousins BSc PhD and PD. Wilson BEng 10 Ignorance is an expensive bliss where motoring is concerned RING MODULATOR by John M.H.Becker 23 Part Two: Music Modulation-The effects NICAD CHARGER by M. Tooley BA and D. Whitfield MA MSc CEng MIEE 38 Fully automatic charger with 24 charge rate options AUDIO NOISE GENERATOR by Tom Gaskell BA(Hons) CEng MIEE 48 Produces "white" and "pink" noise for testing audio systems NEPTUNE AND MENTOR ROBOTS by Richard Becker and Tim Orr 52 Part Four: The electro-mechanics and control electronics for Mentor GENERAL FEATURES SEQUENTIAL LOGIC TECHNIQUES by M. Tooley BA and D. Whitfield MA MSc CEng MIEE 16 Part Three: Latches, registers and counters VERNON TRENT AT LARGE 44 SEMICONDUCTOR CIRCUITS by Tom GaskelI BA(Hons) CEng MIEE 46 Digital Noise Source (MM5837N) NEWS AND COMMENT EDITORIAL 7 NEWS AND MARKET PLACE 8 Including Countdown and Points Arising INDUSTRY NOTEBOOK by Nexus 14 News and views on the electronics industry SPACEWATCH by Dr. Patrick Moore O.B.E. 36 Glorious Past-Bright Future; The Sun; Think Tank; The Sky This Month PRINTED CIRCURT BOARD SERVICE 37 A new service for readers SPECIAL OFFER-PE QUASAR STEREO CASSETTE KIT 45 INDEX FOR VOLUME 20 59 Complete index for PE 1984 BUYER'S GUIDE SOLDERING INSTRUMENTS 30 We look at a wide range of soldering equipment OUR JANUARY 1985 ISSUE WILL BE ON SALE FRIDAY, DECEMBER 7th, 1984 (for details of contents see page 50) | 
